Report of the Honorary Consulting Entomologist for 1884. 323 
mangold- or " beet-carrion- " beetle has been supposed to arise 
from ofFal or portions of dead animals (which the beetles for 
the most part feed on) being mixed with the manure. The 
attack has so rarely been observed, that it would be very desir- 
able to stamp it out at once, and I endeavoured to give all 
necessary information. 
Fig. 1. — Beet-carrion Beetle (Silpha opaca, Linn.). 
1 and 2, yonng and full grown larvae ; 3 and 4, larv.-e magnified; 5, female beetle flying ; 
6, male beetle, slightly magnified. 
The diamond-back turnip-moth has again appeared in large 
numbers in some of the same districts (namely, the North of Eng- 
land and N.E. of Scotland) where it appeared last year. The 
caterpillar feeds on many plants (both cultivated and wild) of the 
cabbage kind, notably on the common weeds called Jack-by- 
the-hedge, hedge-mustard, and others — it turns to chrysalis on 
Pig. 2. — Diamond-haclc Moth, (Cerostoma xylostella, Curtis). 
1, caterpillar ; 2, eggs; 3-5, Diamond-back Moth, nat. size, and m^^ified. 
the food plants or on the ground, and the moths from'' the 
autumn chrysalis do not come out till spring. It would there- 
fore seem desirable, where attack is constant, to see whether 
destroying the weeds, and breaking up the surface of waste 
land where they grow, might not reduce attack. Injury from 
